There have dependably been inquiries of life: how did life start, what is the importance of life, ect. One other inquiry was what matter is made of. In Greece, they used to think the world was made of water, air fire, and earth. Truth be told, Greek savants Leucippus and Democritcus conjectured that issue was made of little, indestructible particles called iotas. At that point logical information developed with the logical technique. John Dalton offered persuading proof that bolstered this claim. The hypothesis that all issue is made out of particles was mentioned out of objective facts and laws. Three most vital were Law of Conservation of Mass, Law of Definite Proportions, Law of Multiple Proportions. The nuclear hypothesis clarifies these laws.